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12/03/1947 US President Harry Truman introduces Truman-doctrine to fight communism

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The Truman Doctrine Explained

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History Brief: The Truman Doctrine

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Truman Doctrine

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Truman's Speech "A Fateful Hour" (1947)

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The Cold War: Crash Course US History #37

Truman announced the doctrine centered on American foreign policy to the Congress. He meant to support free people, resisting outside pressure in order to counter Soviet geopolitical expansion during the Cold War. It shifted the American policy to that of a containment of Soviet expansion, instead of tolerating it.